Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'dc028bb61f1bbc67ce1983425de7187740da649db3d9cc418d79c065609803c2' 
  AND token = 'Xs0/Jty97yU3O+wxO7BEiXO5QhPYmZJ7r80/IIElY2M=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00028

JSON explain

{
  "query_block": {
    "select_id": 1,
    "message": "no matching row in const table"
  }
}